build: disable gcc 10 zero-length-bounds warning
gcc 10 issues warnings about the use of rearm_data marker from struct rte_mbuf. e.g. ../drivers/net/enic/enic_rxtx_vec_avx2.c: In function ‘rx_one’: ../drivers/net/enic/enic_rxtx_vec_avx2.c:21:2: warning: array subscript 0 is outside the bounds of an interior zero-length array ‘RTE_MARKER64’ {aka ‘long unsigned int[0]’} [-Wzero-length-bounds] 21 | *(uint64_t *)&mb->rearm_data = enic->mbuf_initializer; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../lib/librte_mbuf/rte_mbuf.h:45, from ../drivers/net/enic/enic_rxtx_vec_avx2.c:6: ../lib/librte_mbuf/rte_mbuf_core.h:484:15: note: while referencing ‘rearm_data’ 484 | RTE_MARKER64 rearm_data; | Disable this warning for gcc 10 in order to allow v20.05 to build without changes to struct rte_mbuf. Bugzilla ID: 396 Cc: stable@dpdk.org Signed-off-by: Kevin Traynor <ktraynor@redhat.com> Reviewed-by: David Marchand <david.marchand@redhat.com>
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@ -208,6 +208,10 @@ warning_flags = [
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'-Wno-packed-not-aligned',
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'-Wno-missing-field-initializers'
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]
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if cc.get_id() == 'gcc' and cc.version().version_compare('>=10.0')
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# FIXME: Bugzilla 396
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warning_flags += '-Wno-zero-length-bounds'
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endif
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if not dpdk_conf.get('RTE_ARCH_64')
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# for 32-bit, don't warn about casting a 32-bit pointer to 64-bit int - it's fine!!
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warning_flags += '-Wno-pointer-to-int-cast'
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@ -81,6 +81,11 @@ ifeq ($(shell test $(GCC_VERSION) -lt 47 && echo 1), 1)
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WERROR_FLAGS += -Wno-uninitialized
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endif
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ifeq ($(shell test $(GCC_VERSION) -ge 100 && echo 1), 1)
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# FIXME: Bugzilla 396
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WERROR_FLAGS += -Wno-zero-length-bounds
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endif
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HOST_WERROR_FLAGS := $(WERROR_FLAGS)
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ifeq ($(shell test $(HOST_GCC_VERSION) -gt 70 && echo 1), 1)
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